Stump-cutting machine.



A. L. L G. D. MOORE.

STUMP CUTTING MACHINE.

APPLIGATION FILED Nov. 24, 1913.

Patented July 21 19174. a

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STUMP CUTTING MAGHNB.

APPLIOATION FILED 2:0124, 1913.

Patented July 21, 1914.

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AMBROSE LARKIN MOORE AND 'GEORGE DANIEL MOORE, OF NEW ORLEANS, LOUISIANA.

STUMP-CUTTING MACHINE.

i ,i ons: 5.

Specification f Letters Patent.

Patented July 21, 1,914.

Application led November 24, 1913. Serial No. 802,666.

To (1N yw/mm. 'it muy colmo/a lie it known that we, Annaosn L. Moons and (leonor. D. Moons, citizens of the United States, and both residents of New Orleans, in the parish of Orleans and State of Louisiana, have invented a new and Im noved Stump-Cutting Machine., of which the following is a full, clear, and exact description.

(')ur invention relates to a machine for removing stumps by cutting means adapted to be lowered from above the Stump, and gradually fed to the latter until the complete stump is cutI away, leaving only the minor roots, the action of the cutter being,` such as to cause the chips or shavings to be thrown out-ward b v centrifugal force.

The invention will be particularly explained in the specific description followine.

Reference is to be had to the aceompanying drawings forming a part of this specilication, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a side elevation of our improved stump-cutting means, the view including a conventional showing of a portion of the tractor mounting the cutting means; Fig. Q is a front elevation; Fig. 3 is a plan view of the cutter heads, the shaft. thereof being in horizontal section; and Fig. -t is a diagrammatic view indicating the manner in which a stmnp is cut by our improved machine.

In constructing the illustrated Practical embodiment. of our invention any approved form of tractor l is employed, and on an upright frame 11, substantially in A-form, the cutting devices and their actuating means are mounted. An upright shaft 1Q carries at. its lower end an advanced cutterhead 13 and a second cutter-head 1i above the same. A hub or collar 15 is suitably secured to the shaft 1Q and has arms 15 thereon, the outer ends of which terminate in nuts or interiorly threaded collars 15" that are received on a pair of feed screws lo, which are adapted to be turned in unison, or reversed for raising and lowering the shaft 1Q and the cutter heads in the manner hereinafter described. The shaft 1Q has suitable bearings in the frame 11, there being upper and lower bearings 17 indicated.

The cutter-head 13 is provided with a series of arms carrying knives 18, formed with slots 1i) that receive pins Q0 on the cutter head for adjusting the knives. The cutter head tapers toward the bottom and the knives 18 incline rearwardly and outwardly from the lower ends Q1, said lower ends and the outer side edges forming cut.- ter edges. The knives also have a bodily inclination rearwardly and inwardly from their front cutting edges Q1". The upper cutter head 14 presents radial arms 1st", which toward the outer ends have a downward and forward inclination, and are provided with knives QQ having a slot and pin connection QQ, QQ", with the arms to provide for adjustment. of t-he said knives. The forward faces of the inclined portions of the arms 1-t and the knives QQ are also inclined upwardly and rearwardly.

As the cutter heads are lowered the stump A will be gradually cut away, a central cavity ot truncated conical form, as indicated by a in Fig. 4, being produced by the advance cutter head 13, and a complementary annular depression a. will be produced around the central cavity until only the minor roots L2 of the stump remain. In the operation of the cutter head centrifugal force will throw the chips and shavings outwardly in all directions.

The feed screws 1G turn in upper andlowcr bearings Q8, Q3, which may be formed on brackets Q-l, as indicated in Fig. 1.

To turn the shaft 1Q for rotating the cutter heads, said shaft is provided in the example shown, with a bevel pinion Q4 meshing with which is a. similar pinion Q5 on a drive shaft Q6, the outer end of which may have a bearing in the frame 11, and at an intermediate point ou a stand QT, there heing a belt. pulley QS to receive a belt QS, driven from any suitable source of power on the tractor 10.

For turning the feed screws 1G to raise and lower the shaft 1Q and the cutter heads, we have shown the said screws provided with bevel pinions Q9, which are geared toffetbcr by bevel pinions and a shaft 531. ileshing with one of the bevel pinions Q51 is a pinion 3Q on a driven shaft B213, which may be actuated in opposite directions by a friction drive or equivalent means. le have illust-rated the drive as consisting of a friction pulley 34 fast on the shaft. 23 and actuated m either direction from a shaft 35 having a drive pulley 3G, on which is loosely mounted a lever B7, which carries friction pulleys 37, 37", one of which is in frictional. engagement with a friction pulley 37e on the shaft B5. By rocking the lever 37 either' intermediate pulley 87 or 37b may be thrown into engagement with the frictionpulley 34: on the shaft 33, and thus the latter shaftl may be turned in either direction to so turn the screws as to raise or lower the shaft ll in the cutter heads. A belt pulley 38 runs over the pulley 3G and over a pulley 39 on a counter shaft i0` carrying a belt pulley il to be driven by a belt not shown) from any convenient driven pnl ey on the tractor.

It is to be understood that the shaft l2 is free to slide in the bearings 1T as well as to turn therein, and the connection with the pinion Q-i and its hub 24 is such that the shaft will be turned by said pinion, but is free to slide therein.

'The means for sup orting the bearings 28 at the lower end o the feed screws, and supporting the shaft and the friction gear elements associated with it consist, in the example shown, of a bracket 23 secured to the frame 1l having an extension 23 forming a bearing for the shaft 35.

ln practice, the radial arms 14 are provided with a ring 14 extending around the arms, near the outer ends thereof, said ring constituting a brace and strengthener for preventing the springing of the arms when the cutter is in o ieration.

Having thus described our invention, we claim as new and desire to secure by Letters Patent:

l. In a stump-cutting,r machine, a driven upright shaft. mounted to be raised and lowered. an advance cutter head Carried by said shaft at the lower end, said head having knives divcrging in an upward direction, and a second cutter head on said head above and co-axial with the advance cutter head, said second cutter head having arms extending voutwardly beyond the first cutter head, the outer ends of the arms being downwardly and forwardly inclined and provided with forward faces, the latter having knives thereon, the knives having an inelination rearwardly and upwardly and having forwardly disposed cutting edges at the outside and at the bottom ends thereof.

2. In a stumpeuttin r machine, an upright shaft mounted tobbe raised and lowered, means for driving said shaft, and stump-cutting means comprising a central advance cutter head having knives that diverge in an upward direction, said knives having transverse cutting edges at their lower ends, and the outer edges thereof being also cutting edges, and members above the advance cutter head and extendiinT out-l wardly beyond the latter, and forwardly and downwardly inclined, the said members having cutter knives thereon presenting forward cutting edges.

3. In a stump-cutting machine, a driven shaft mounted to be raised and lowered, a downwardly tapered advance cutter head on the lower end of the shaft, said head having cutter knives diverging in an upward direction, and upper cutter members on the shaft overhanging above and outside of the tapered cutter head, the said ovcrhanging portions of said members having a downward inclination and provided with cutter knives.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

AMBROSE LARKIN MOORE. GEORGE DANIEL MOORE.

Witnesses ln'rnn B. ZIMMna,

inonoa Miam-1a.

@epics of this patent may be obtained tor ave cents eanh, by addressing the Commissioner of Eater-its, Washington, D. D. 

